Answer: Anaconda plan
Step-by-step explanation:
The Anaconda plan was a military strategy proposed early in the American Civil War. The plan called for a naval blockade of the Confederate Littoral (seaside), a thrust down the Mississippi, and the strangulation of the South by Union land and naval forces.
Like an Anaconda strangles its prey, the plan "strangles" the south.
I hope this explains everything clearly.